spyhole

英 [ˈspaɪhəʊl]

美 [ˈspaɪhoʊl]

n.  (门上的)观察孔，猫眼儿

复数：spyholes　

BNC.49370

牛津词典

noun

• （门上的）观察孔，猫眼儿
  a small hole in a door that you can look through to see who is on the other side before opening the door

英英释义

noun

• a hole (in a door or an oven etc) through which you can peep
  Synonym:peepholeeyehole